Combination t-square, scratch-gage, and compass.



F. J. ONBIL.

oomnmumn T-SQUARE, sonucn GAGE, AND commas.

APPLIOATION FILED OUT. 11, 1909.

Patented Sept. 20, 1910.

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FRANK J. ONEIL, OF NEW BRITAIN, CONNECTICUT.

COMBINATION T-SQUARE, SCRATCH-GAGE, AND COMPASS.

Specification of Letters Patent.

Patented Sept. 20, 1910.

Application filed October 11, 1909. Serial No. 522,048.

To all whom it may concern:

Be it known that I, FRAME J. ONmn, citizen of the United States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inCombination T-Squares, Scratch-Gages, and Compasses, of which thefollowing is a specification.

My invention relates to carpenters tools, and the object thereof is toprovide a cheap, durable and eflicient device capable of being used as acombination T sq uare, scratch gage and compass, the same beingextremely simple in construction and capable of being easily adjusted.

For a full understanding of the invention and the merits thereof, and toacquire a knowledge of the details of construction,

reference is to be had to the following description and accompanyingdrawing, in which:

Figure 1 is a perspective view of my device; Fig. 2 is a longitudinalsection thereof; Fig. 3 is a perspective view of the slide de tachedfrom the rule and looking toward the under side of the slide; Fig. 4 isa transverse section of the rule, the flanged end of the slide beingshown in elevation.

orresponding and like parts are referred to in the following descriptionand indicated in all the views of the drawing by the same referencecharacters.

Referring to these drawings, 2 designates a rule, preferably of metaland of any desired length, having thereon the graduations 3.

4 designates a slide shiftable upon the rule, said slide consisting of afiat plate of metal, one end of which is expanded to a width wider thanthe width of the rule and formed with a downwardly turned flange 5, saidflange at its middle being provided with the downwardly projectingpointed stud or. pin 6. The widened or expanded portion of the slide iscut away on opposite sides to form tongues 7, these tongues being turnedover the rule, as shown in Fig. 1, to engage opposite margins of thesame to permit the rule to have an easy sliding movement relative to theslide. The opposite end of the slide is transversely slitted, as at 8,this slit being angular in form, and the portion 9, rearward betweensaid slit and the adjacent extremity of the slide, being raised adistance equal to the thickness of the'rulc, to permit the rule to passthrough the slit and beneath the portion 9, thereby forming a bridgepassing across the rule and holding the rule and slide in engagementwith each other. The sliding plate 4 is formed on its under side withthe opposed downwardly projecting tongues 11 between which is pivotedthe clamping lever 12, said lever being angularand its end projectingthrough the opening left in the plate 4 by the bending up of the tongues11.

It will be obvious that when the clamping lever is turned flat againstthe back of the rule, as shown in Fig. 2, the rule and slide will beheld in locked engagement with each other, while when the lever isturned outward, the rule will be unclamped and may be slid relatively tothe slide 4. The extremity of the rule is oppositely slotted, and thewings formed thereby are turned upward and then bent around to form thesplit ring 13 which is adapted to receive a pencil or scratch awl.

The operation of my device is as follows: The downwardly turned flange 5is intended to form an edge for a T square or sliding scratch gage. Itwill be obvious that this downwardly turned flange, extending as it doesat right angles to the rule, permits the rule to be used in the samemanner as a T square or a scratch gage. It will also be plain that byforcing the point (5 into the material operated on, and turning the rulein a circle with a scratch awl or pencil held in the socket 13, thedevice will act as a compass for the drawing of circles, and that byplacing the flange 5 against the edge of a board, and placing thescratch awl or pencil in the socket, the device may be used as a scratcha -e.

b This tool is to be constructed from either sheet brass or steel,preferably nickel plated brass, as the latter is non-corrosive.

It will be seen that the device is made in only three parts, very simplyconstructed and easily put together, and that notwithstanding itssimplicity, it is thoroughly effective in use.

Having thus described the what I claim is 1. An implement of thecharacter described, comprising a flat graduated rule having a socketformed at one end for the invention,

reception of a marking reception of a point, a slide having opposedinwardly turned tongues grasping the edges of the rule, said slide beingslotted transversely to permit the passage of the rule therethrough, themetal of the slide on one side of the slot being elevated, opposed lugsupwardly turned upon the face of the slide, and a clamping lever pivotedbetween said lugs and havin an angular end engaging with the face of therule to clamp the slide in position.

2. An implement of the character described, comprising a flat graduatedrule having a socket formed at one end for the point, a slide havingopposed tongues adapted to engage the opposed margins of the rule andformed with a transverse slot through which the rule passes, the metalof the slide on one side of the slot being elevated to permit thepassage of the rule, said slide being also formed with opposed lugsstruck up from the body of the slide, and a clamping lever pivotedbetween said lugs and having an angular end engaging the rule when thelever is turned in one position, said slide being provided at oneendwith a flange projecting outwardly from the face of the slide andextending at right angles to the rule,

the flange at its middle being provided with a projecting point.

3. An implement of the character described, comprising a flat graduatedrule of metal, the extremity of the rule being slotted to form opposedwings, said wings being bent to form a split socketfor the reception ofa marking point, -a slide having at one end a projecting flangeextending at right angles to the rule, said slide being formed at oneend with opposed tongues bent over and clasping the edges of the rulethe other end of the slide being provided with a slot through which therule passes, the metal of the slide on one side of said slot beingelevated to permit the passage of the rule, said slide having opposedlugs struck out from its face, and a clamping lever pivoted between saidlugs and having an angularly bent end adapted to engage the rule to holdthe slide in ad- 2 justed position.

In testimony whereof affiX my signature in presence of two witnesses.

FRANK J. ONEIL. a 5.

